I wonder sometimes if the people of Gobleki Tepe were just oddly prophetic or if cultural erasure has been going on a hell of a lot longer than we think it has.

Something I only learned well into my adulthood is that one of the reasons you can dig down and find the foundations of one, sometimes two different cultures below the feet of cities is that they used a lot of mud bricks, and when the house started to molder and fail they would pound it flat and start over, not haul the whole thing away. So a couple times a generation a neighborhood would be higher than it was before.

And the center of the city would be on a hill, and keep getting higher (even if expansion kept the slope roughly the same). Over time it would become more and more work to get to the middle of a city from the plains surrounding it.